Abstract: A device consisting of a circuit which senses the state of an appliance, power on or power off, and a switch, usually remotely located, suitable for handling RF or video signals, which is controlled by said circuit for use in the selection of program material to be processed and/or displayed by a television receiver, video monitor or other device is disclosed. This device facilitates the use of video games, home computers and the like when it is desired that the display device be connected to more than one signal source.This abstract is not to be taken either as a complete exposition or as a limitation of the present invention, however, the full nature and extent of the invention being discernable only by reference to the entire disclosure.

Abstract: As disclosed herein, a new and improved method and apparatus provides for the ensonification of at least a portion of a body part with acoustic energy pulses; detects the polarity and amplitude of the resultant echo pulse; and displays the detected data in a color television format to result in an improvement in resolution in indicia of tissue character. This improvement is accomplished by a process which simultaneously detects both the amplitude or strength of the echo pulse and the polarity sense of the echo pulse at the peak amplitude for each echo pulse. The improvement utilizes a general property of acoustical pulses to detect polarity and amplitude of the echo pulse. The amplitude and polarity measures of the echo pulse are used to produce intensity (luminance) and color (chrominance) throughout the body part for each individual picture element (pixel) forming the picture.